TWI384861B - Image sensor and image reading device having dual image sensors - Google Patents

Description

Image sensor of image reading device and image with dual image sensor Reading device

The present invention relates to an image reading device suitable for a transaction machine, and more particularly to an image reading device with a dual image sensor.

With the great advancement of electronic technology, all the work in today's office is closely related to photocopiers, fax machines, printers, scanners, etc., and the current electronic devices are mostly oriented towards the development of a multi-functional technology. The versatile machine that can integrate the aforementioned functions has gradually become the mainstream of the current market.

Regardless of whether it is a scanner or a MFP, the image reading device must maintain the quality of the scanned data. Before reading the data, it must be based on the environment, brightness, and sensing component itself. The sensing component performs parameter compensation correction with equal brightness and color. In addition, in order to speed up the scanning of the front and back images, it is possible to design the image reading on both sides of the image by two image sensors, but the light is reflected on the surface of the original image where the two image sensors are located. Similarly, the quality of the two image sensors is not exactly the same, so the image quality of the two image sensors is different, so how to design two image sensors for image correction In order to maintain the same scanning state of the two image sensors, it is very important in the image reading device with dual image sensors.

However, there may be disadvantages in the prior art, for example, when the difference between the compensation correction position and the actual scanning position is too large, the correction distortion may be caused, the scanning quality may be flawed, or the correction component may be worn due to the passage of the paper. Or pollution, it will also cause correction distortion, which makes the scan quality flawed.

Therefore, how to make the state of the compensation correction closer to the state when the image is read, and the smaller the compensation correction distortion is to improve the scanning quality, and the people in the field have been striving to develop an improvement direction.

The main purpose of the present invention is to provide an image reading device with a dual image sensor, which has a design of a correction roller and an elastic top contact element, which can avoid correction distortion and improve scanning quality, so as to improve the lack of the prior art.

In order to achieve the above object, a broader aspect of the present invention is to provide an image reading apparatus with a dual image sensor, which is suitable for a transaction machine having a transaction machine body and an automatic paper feeding device. The image reading device includes: a first image sensor disposed on the automatic paper feeding device; and a second image sensor disposed on the server body; wherein the first image sensor and the first image sensor The second image sensor respectively senses and reads data of the first side and the second side of a manuscript, and the first image sensor includes at least: a first optical module, including a first light source a first sensing element and a glass surface; a first correcting element disposed on the opposite side of the first optical module; and a resilient top contact element having a fixed end at one end and the first optical end contacting the first end The glass surface of the module is such that the document is in close contact with the glass surface.

Another broad aspect of the present invention provides an image sensor of an image reading device, which is disposed on an automatic paper feeding device of a transaction machine for sensing and reading data of a manuscript, and The image sensor comprises at least: an optical module comprising a light source, a sensing component and a glass surface; a correction roller disposed on the opposite side of the optical module; and an elastic top contact component fixed at one end thereof The other end contacts the glass surface of the optical module such that the document is in close contact with the glass surface.

Some exemplary embodiments embodying the features and advantages of the present invention are described in detail in the following description. It is to be understood that the present invention is capable of various modifications in the various aspects of the present invention, and the description and illustration are in the nature of

The present invention mainly provides an image reading device with a dual image sensor, which is suitable for a transaction machine having a transaction machine body and an automatic paper feeding device, the image reading device comprising: a first image sense a first image sensor and a second image sensor are respectively disposed on the printer body; and the second image sensor is respectively disposed on the server body; wherein the first image sensor and the second image sensor are respectively sensed And reading the data of the first side and the second side of the manuscript, and the first image sensor comprises at least: a first optical module, comprising a first light source, a first sensing component and a glass surface a first correcting component disposed on the opposite side of the first optical module; and a resilient top contact component having a fixed end at one end and the glass surface of the first optical module at the other end to enable the document Close to the glass surface. The structural features of the image reading device with dual image sensors in this case will be described in detail below with reference to the drawings.

Please refer to the first figure, which is a schematic structural diagram of an image reading device with a dual image sensor. As shown in the figure, the image reading device 10 is applicable to a transaction machine 1, and the transaction machine 1 can be However, it is not limited to a scanner or a multifunction printer, and the transaction machine 1 has a transaction machine body 40 and an automatic paper feeding device 50, and the transmission path of the document paper to be scanned in the automatic paper feeding device 50 is As shown by line P.

The image reading device 10 of the present invention mainly includes a first image sensor 20 and a second image sensor 30, wherein the first image sensor 20 is disposed on the automatic paper feeding device 50, and the second image is The sensor 30 is disposed on the transaction machine body 40. When the manuscript paper is transported in the automatic paper feeding device 50, the first image sensor 20 and the second image sensor 30 respectively sense and read the manuscript. The information on the first side and the second side, that is, the data on both sides of the manuscript can be read simultaneously during the paper transport to increase the scanning speed.

The first image sensor 20 includes a first optical module 21 and a first correcting component. The first optical module 21 includes a first light source 211 and a first sensing component 212. The first light source 211 provides light required for scanning, and the first sense The measuring component 212 receives the reflected image information as a basis for image presentation. The first sensing component 212 can be a contact image sensor (CIS) or a charge coupled device (CCD). In some embodiments, the first optical module 21 can further include a series of mirrors and lenses (not shown) to form an optical path, and transmit image information to the first sensing element 212 for imaging.

In order to maintain the scanning quality, the image reading device 10 must perform the compensation correction of the optical parameters of the sensing component according to the environment and the difference of the sensing component itself before reading the data, including brightness correction, hue correction and Compare corrections, etc. According to the preferred embodiment of the present invention, the first correcting component 22 of the first image sensor 20 is a cylindrical roller disposed on the opposite side of the first optical module 21, and the first light source 211 emits light and is first corrected. After the component 22 is reflected, the optical signal is received by the first sensing component 212 and processed into a standard value for use as a compensation correction reference for the color hue and brightness of the subsequent scan. In an embodiment, the roller is a white roller, but is not limited thereto.

The drum can be rotated by a power source (not shown), and during the rotation, since the light of the light source can be irradiated at different positions of the drum, a plurality of reading lines can be obtained, and all the reading lines are obtained. The scan data can be averaged to produce a correction reference for the image signal to achieve multi-point compensation. In one embodiment, the drum of the present invention rotates synchronously at a speed consistent with the speed of the manuscript paper, preventing relative friction between the paper and the drum, causing scratches on the drum to damage the drum, and correcting distortion. In addition, in order to maintain the level of compensation correction, the hue, brightness and surface treatment of the drum should be maintained within a certain range, and the drum must be wear-resistant, easy to wipe and clean, so that the drum can be quickly cleaned when contaminated, Leave traces. For example, the material of the drum may be a plastic such as PE, PPS, PBT or POM, but not limited thereto.

Since different depth of field conditions are required when different sensing elements are used, for example, the depth of field of the CIS is shorter than the depth of field of the CCD, which is about 0.1-0.3 mm, so the CIS is more limited in use. When the image sensor adopts CIS as the sensing component, the first correcting component 22 is designed to be close to the glass surface 213 of the first optical module 21, but still retains a gap D (as shown in the second figure), avoiding the first A correcting element 22 contacts the glass surface 213 for wear and contamination. In addition, the proximity of the first correcting element 22 to the glass surface 213 can also limit the floating phenomenon of the paper on the glass surface 213, but to avoid paper abrasion or contamination of the first correcting element 22 and to promote the paper to the glass surface 213 for better scanning. The first image sensor 20 of the present invention further includes an elastic top contact member 23, which is a spring piece, such as but not limited to a metal elastic piece or a plastic elastic piece, and the elastic top contact element 23 is disposed on the paper conveying path. The first correction element 22 is in the front. One end 231 of the elastic top contact member 23 is fixed under the paper passage, and the other end 231 is naturally lifted and contacts the glass surface 213 of the first optical module 21, thereby providing the paper sticker with the natural elasticity of the elastic top contact member 23. The elastic force of the glass surface 213 is tight to provide the same glass bonding force to paper of different thicknesses, ensuring that the paper is within the depth of field of the first sensing element 212.

Please refer to the third figure, which is a schematic diagram of a first image sensor of another embodiment. As shown, the elastic top contact element 23 is in contact with the glass end 213 of the first optical module 21 below one end 232. An elastic member 233, such as but not limited to a foam or a rubber gasket, is provided to assist the end of the elastic top contact member 23 to contact the glass surface 213 of the first optical module 21 to facilitate the bonding of the paper to the glass surface. 213.

Of course, the thickness and weight of the paper or the tension of the paper in the channel by the front and rear paper rollers may press the elastic abutting member 23 downward, so the elastic abutting member 23 is designed to take into account the length so that it does not under pressure. The first correcting element 22 is contacted to prevent the elastic resisting element 23 from rubbing against the first correcting element 22 to damage the first correcting element 22, thereby affecting the accuracy of the correction.

Since the first correcting element 22 is close to the glass surface 213 of the first optical module 21, the compensation correction position of the image reading device of the present invention is almost the same as the position of the actual scanning, so as to avoid the compensation of the corrected position and the actual scanning. The position difference is too large to cause correction distortion, which makes the scanning quality have the disadvantages. Meanwhile, in order to avoid paper abrasion or contamination of the first correcting element 22, the first image sensor 20 has an elastic top contact element 23 for bonding the paper to the glass surface 213 of the first optical module 21 by its elasticity, and A correcting element 22 is rotated synchronously at a speed consistent with the paper feed speed to prevent the paper from rubbing against the first correcting element 22, causing the first correcting element 22 to leave scratches or contamination, thereby correcting the distortion.

Please refer to the fourth figure, which is an enlarged view of the second image sensor 30 in the first figure. As shown, the second image sensor 30 includes a second optical module 31 and a second correcting component. 32. The second optical module 31 includes a second light source 311 and a second sensing element 312. The second light source 311 provides light for scanning, and the second sensing element 312 receives reflection. Image information as a basis for image presentation. The second sensing element 312 can also be a CIS or a CCD. In some embodiments, the second optical module 31 can further include a series of mirrors and lenses (not shown) to form an optical path, and transmit image information to the second sensing element 312 for imaging.

Similarly, in order to maintain the scanning quality, the image reading device 10 must perform the compensation correction of the optical parameters of the sensing component according to the environment and the difference of the sensing component itself before reading the data, including brightness correction, Hue correction and contrast correction, etc. According to the preferred embodiment of the present invention, the second correcting component 32 of the second image sensor 30 is a correcting sheet disposed on the opposite side of the second optical module 31, and the second light source 311 emits light and is used by the second correcting component. After the reflection of 32, the optical signal is received by the second sensing component 312 and processed into a standard value for use as a compensation correction reference for the color hue and brightness of the subsequent scan.

In addition, the second image sensor 30 can be designed as a mobile image sensor, for example, moving along the slide rail in the transaction machine body to scan a plurality of read lines on the correction sheet to obtain a better correction effect.

Of course, the first image sensor 20 and the second image sensor 30 of the present invention are applicable to the double-sided paper-feeding machine with the dual-image sensor, and can be respectively configured to be configured with only a single image. The servo of the sensor, and the compensation is corrected by the same device and actuation principle.

Therefore, the image sensor 20 of the image reading device is also disposed on the automatic paper feeding device 50 of the transaction machine 1 for sensing and reading the data of a manuscript. The image sensor 20 includes at least one optical module 21 including a light source 211, a sensing component 212 and a glass surface 213, a calibration roller 22 disposed on the opposite side of the optical module 21, and an elastic top The contact element 23 has one end 231 as a fixed end and the other end 232 contacting the glass surface 213 of the optical module 21 so that the document is in close contact with the glass surface. The detailed structure of the image sensor 20 has been described in detail in the foregoing, and therefore will not be described again.

In summary, the present invention provides an image reading device with a dual image sensor, which includes a first image sensor and a second image sensor, which are respectively disposed on the automatic paper feeding device and the transaction machine body. To read the front and back data of the document to be scanned separately, wherein the first image sensor disposed on the automatic paper feeding device uses a roller as the correcting component and rotates synchronously at a speed consistent with the driving speed of the document. And the first image sensor further comprises an elastic top contact element, wherein one end is a fixed end, and the other end contacts the glass surface of the optical module, so that the document is in close contact with the glass surface, and the paper and the correction roller are avoided. Causes the correction roller to leave scratches or contamination, which makes the correction distortion. Therefore, the image reading device with dual image sensor in this case can improve the lack of the prior art and improve the scanning quality, so it is of great industrial value, and meets various patent requirements, and applies in accordance with the law.

This case has been modified by people who are familiar with the technology, but it is not intended to be protected by the scope of the patent application.

1. . . Transaction machine

10. . . Image reading device

20. . . First image sensor

twenty one. . . First optical module

211. . . First light source

212. . . First sensing element

213. . . Glass surface

twenty two. . . First correcting element

twenty three. . . Elastic top contact element

231, 232. . . end

233. . . Elastic object

30. . . Second image sensor

31. . . Second optical module

311. . . Second light source

312. . . Second sensing element

32. . . Second correcting element

40. . . Transaction machine ontology

50. . . Automatic paper feeding device

D. . . gap

P. . . Paper conveying path

The first picture is a schematic diagram of the structure of the image reading device with dual image sensor.

Second figure: This is an enlarged view of the first image sensor in the first figure.

Third Figure: It is a schematic diagram of a first image sensor of another embodiment.

Figure 4: This is an enlarged view of the second image sensor in the first figure.

1. . . Transaction machine

10. . . Image reading device

20. . . First image sensor

30. . . Second image sensor

40. . . Transaction machine ontology

50. . . Automatic paper feeding device

P. . . Paper conveying path

Claims (20)

An image reading device with a dual image sensor is applicable to a transaction machine having a transaction machine body and an automatic paper feeding device, the image reading device comprising: a first image sensor, setting And the second image sensor is disposed on the transaction machine body; wherein the first image sensor and the second image sensor respectively sense and read one The first image and the second side of the document, and the first image sensor comprises: a first optical module, comprising a first light source, a first sensing component and a glass surface; a correcting component disposed on the opposite side of the first optical module; and a resilient top contact component having a fixed end at one end and the glass surface of the first optical module at the other end such that the document is in close contact with the glass The elastic top contact member further includes an elastic member disposed below the end of the elastic top contact member in contact with the glass surface to assist in contacting the end of the elastic top contact member to the glass surface . The image reading device with a dual image sensor according to claim 1, wherein the first image sensor is a contact image sensing device (CIS) or a charge coupled device (CCD). The image reading device with a dual image sensor according to claim 1, wherein the second image sensor is a contact image sensing device (CIS) or a charge coupled device (CCD). The image reading device with a dual image sensor according to claim 1, wherein the first correcting element is a cylindrical roller. An image reading apparatus with a dual image sensor as described in claim 4, wherein the roller is a white roller. The image reading device with dual image sensor according to claim 1, wherein the first correcting element rotates synchronously at a speed consistent with a driving speed of the document. The image reading device with a dual image sensor according to claim 1, wherein the first correcting element has a gap between the glass surface of the first optical module. The image reading device with a dual image sensor according to claim 1, wherein the elastic top contact element is a spring piece. The image reading device with a dual image sensor according to claim 1, wherein the elastic top contact element is disposed in front of the first correcting element on a transport path of the document. The image reading device with a dual image sensor according to claim 1, wherein the fixed end of the elastic top contact member is fixed below the document passage. The image reading device with a dual image sensor according to claim 1, wherein the elastic object is a foam or a rubber gasket. The image reading device with a dual image sensor according to the first aspect of the invention, wherein the second image sensor comprises a second optical module and a second correcting component, wherein the second optical module A second light source and a second sensing element are included, and the second correcting element is a calibration sheet. An image sensor of an image reading device is disposed on an automatic paper feeding device of a transaction machine for sensing and reading data of a manuscript, and the image sensor comprises at least: An optical module includes a light source, a sensing component and a glass surface; a correction roller disposed on an opposite side of the optical module; and a resilient top contact component having a fixed end at one end and the optical contact at the other end The glass surface of the module is such that the document is in close contact with the glass surface, wherein the elastic top contact element further comprises an elastic member disposed below the end of the elastic top contact element in contact with the glass surface to assist The end of the resilient top contact member is placed up against the glass surface. The image sensor of the image reading device of claim 13, wherein the image sensor is a contact image sensing device (CIS). The image sensor of the image reading device of claim 13, wherein the correction roller rotates synchronously at a speed consistent with a driving speed of the document. The image sensor of the image reading device of claim 13, wherein the correcting element has a gap between the glass surface of the optical module. The image sensor of the image reading device of claim 13, wherein the elastic top contact element is a spring piece. The image sensor of the image reading device of claim 13, wherein the elastic top contact element is disposed in front of the correcting element on the transport path of the document. The image sense of the image reading device as described in claim 13 The detector, wherein the fixed end of the elastic top contact element is fixed below the document passage. The image sensor of the image reading device of claim 13, wherein the elastic member is a foam or a rubber gasket.